The Printliminator (repo) is a bookmarklet with some simple tools you can use to makes websites print better. One click to activate, and then click to remove elements from the page, remove graphics, and apply better print styling.
Here is the bookmarklet:
The Printliminator ← drag to your bookmarks bar
By Chris Coyier and Devon Govett. Updates & extensions by Rob Garrison. Print stylesheet based on Hartija.